gradual speed increase

Bug #505901 reported by Antonio Roberts
This bug report is a duplicate of:  Bug #725303: Smooth video retiming. Edit Remove
14
This bug affects 2 people
Affects Status Importance Assigned to Milestone
OpenShot Video Editor
Triaged
Wishlist
Unassigned

Bug Description

Could you add a feature that enables you to gradually increase or decrease the speed of a video?

Tags: keyframe
Revision history for this message
Andy Finch (fincha) wrote :

Thanks for your suggestion.

Changed in openshot:
importance: Undecided → Wishlist
Revision history for this message
Nicholas Seward (nicholas-seward) wrote :

I added this as a blueprint before I saw this.

Currently it is possible to cut a clip into multiple segments and increment each clip from your required start speed to your end speed. This is time consuming and technically difficult. Faster speeds require larger original clip segments and slower speeds require smaller original clip segments. Trying to figure out the correct way to slice the clips required a bit of calculus in the case of a tapered speed ramp. There is also the added problem of having all the multiple segments to deal with which would require an additional export to make them usable as a unit. (It would also be great if the audio came with it but I know that is already requested.) I would gladly provide pseudo code and/or calculus help. (In my opinion for this to be simple it would have to be part of the advanced speed settings of a clip.)

Revision history for this message
Nicholas Seward (nicholas-seward) wrote :

Attached is a very detailed document complete with graphs and pseudocode (sorry don't know python or the project architecture) for the implementation of speed ramping. Let me know if I can be of any assistance in the future.

Revision history for this message
Jonathan Thomas (jonoomph) wrote : Re: [Openshot.developers] [Bug 505901] Re: gradual speed increase

Thanks for the detailed info. This would be great as an effect in MLT or
frei0r. We've added it to the "wish list", so we'll revisit it soon.
Thanks!

On Wed, Mar 10, 2010 at 1:01 AM, Nicholas Seward
<email address hidden>wrote:

> Attached is a very detailed document complete with graphs and pseudocode
> (sorry don't know python or the project architecture) for the
> implementation of speed ramping. Let me know if I can be of any
> assistance in the future.
>
> ** Attachment added: "video speed ramping.pdf"
> http://launchpadlibrarian.net/40671938/video%20speed%20ramping.pdf
>
> --
> gradual speed increase
> https://bugs.launchpad.net/bugs/505901
> You received this bug notification because you are a member of OpenShot
> Developers, which is subscribed to OpenShot Video Editor.
>
> Status in OpenShot Video Editor: New
>
> Bug description:
> Could you add a feature that enables you to gradually increase or decrease
> the speed of a video?
>
>
>
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tags: added: keyframe
Changed in openshot:
status: New → Confirmed
Changed in openshot:
status: Confirmed → Triaged
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